. >> reporter: republican senator lindsey graham is pushing for a committee to investigate all of this, saying it's grown too vast and intertwined for individual committees to investigate separately. >> thank you. president obama is putting together his cabinet for a second term, including a new cia director. so far, hillary clinton has confirmed she's going to leave. as bill plante reports, republicans already are objecting to her potential replacement. bill, good morning. >> reporter: good morning, norah. that's exactly right. cbs news has learned that the president is likely to nominate susan rice, the u.s. ambassador to the united nations, to replace hillary clinton as secretary of state. white house sources say the president feels that he should be able to choose the cabinet members he wants, and they say that rice has done a good job on iran and north korea. but rice was the public face of the administration's initial response to the attacks in benghazi, libya, saying that they were prompted by spontaneous protests, not terrorism, and she's come under fire from republicans. when